Propulsion of vessels.



T. MILLS. PROPULSION OF VESSELS.

APPLICATION FILED JULY 25, 1912.

1,049,384. Patented Jan. 7, 1913.

the action of the propeller.

UNITED sTATEs PATENT OFFICE.

PROPULSION 0F VESSELS.

Specification of Letters Patent. Patented J an. '7, 1913.

Application filed July 25, 1912. Serial No. 711,435.

ioaassaf expels the water from the space f when the vessel is being driven forward while the. set 6 comes into operation when the vessel is being driven astern. As the water is expelled from the space 1 air is admitted to it through 4 the pipe g. A shield h secured by a stay 6 to a bearing on the propeller shaft and by a stay secured to the vessel, covers the top of the propeller.

IVhat I claim is: he

1. A-vessel with the whole fore part of a stationary curved conical form, surrounded by a hollow conical propeller of corresponding form and adapted to revolve thereon and having blades projecting from its ii exterior and winding around it, and blades on its interior at the end adjacent to the vessel. I j

2. A vessel having at its front end a stationaryconiral portion a, in con'ibination with a hollow conical propeller adapted to revolve about said portion a, having spirally arranged blades on its exterior and blades in its interior at the end adjacent to the .vessel and. provided with means for revolv- To aZlrw/wm it may concern:

Be it known that I, THOMAS MILLS, a subject of the King of Great Britain, residing at Longdown Lodge,

Sandhiirst, Berkshire, England, have invented new and useful Improvements in the Propulsion of Ves sels, of which the following'is a specification.

This invention relates to improvements in the propulsion of vessels such as are described in the specification of'my prior Patent No. 457361. Such a vessel has a fore part of a curved conical form surrounded,

ahollow c nical propeller of corresponding form and adapted to revolve thereon and having-blades projecting from its exterior.

The object of thisinvention is to lessen the friction of'the conical propeller turning on the fore part, which friction is largely caused by'the water entering the space between the propeller and tore part.

According to this invention I provide the conical propeller with two sets of internal blades, one set for expelling'the water from this space when the vessel is being driven forward and the other when the vessel is being driven astern. I also provide a shield over the top of the propeller which prevents the water from flying upward and so aids 3. A vessel with the whole tore part of a stationary curved conical form, surrounded bya hollow conical propeller of correspond-- ing form and adapted to revolve thereon and having blades projecting from its exterior and winding around it. and blades on its interior at the end adjacent to the "esscl, and a shield at the top (it the conical propeller.

The drawings illustrate apparatus made in accordance with this invention.

Figure 1 is a side elevation, Fig. 2 a vertical section and Fig. 3 a transverse section on the line 3-3 Fig. 2.

r1 '\5' Aw. I 1 F a is the fore part of Mlli the vessel capable of turning upon which is a propeller I) Witnesses: havin external curved blades 0 and two 0. J. Wonrn, sets 0 C. P. LlDDON.

internal blades (land 0. The set- (1 l 

